摘要
研究目的:框架板式无砟轨道是一种新型轨道结构,广珠城际轨道交通采用框架板式无砟轨道,但目前国内尚未建立系统的设计方法。通过本文研究,建立框架板式无砟轨道计算模型和结构计算方法,掌握框架板式无砟轨道受力和变形的基本规律,为框架板式无砟轨道设计提供理论依据。研究结论:框架板式无砟轨道具有良好的技术经济性,采用框架型板式轨道对于降低轨道板翘曲的影响是有利的。本文建立的无砟轨道计算模型和结构分析方法能够考虑列车荷载、温度荷载、路基不均匀沉降和桥梁挠曲等因素,可以系统地进行框架板式无砟轨道结构分析,进而掌握框架板式无砟轨道受力和变形的基本规律。通过设计参数(CA砂浆弹性模量、扣件刚度、基础不均匀沉降)对框架板式无砟轨道受力和变形的影响分析,可见轨道板和底座的受力和变形随着CA砂浆弹性模量的增加而减少,随着扣件刚度的增大而增大,随着不均匀沉降量的增大而增大。
Research purposes： Frame - slab track is a new kind of track and has been applied in Guangzhou - Zhuhai Intercity Rail Transit, but the method of systemic design has not been established. This paper sets up the calculation model and method of the frame - slab track, predominates the rule of force and deformation of frame - slab track, provides support for the frame - slab track design.
Research conclusions ： Frame - slab track is be provided with favorable technical and economy, frame - slab is benefit to reduce the influence of wrap deformation of slab. The model calculation model and analysis method established in this paper take in count of the load of train, temperature load and asymmetry settlement, bend of bridge, etc. can systemically analyse the frame - slab track, predominate the rule of force and deformation. By analysis the influence of design parameter to force and deformation, this paper draws a conclusion that the force and deformation of the slab bottom is decrease with the accretion of elastic modulus of CA sand mortar, and increase with the accretion of stiffness of fastener and settlement of substructure.
出处
《铁道工程学报》
EI
北大核心
2008年第8期27-32,共6页
Journal of Railway Engineering Society
作者简介
江凤林，1962年出生，男，高级工程师。
